Helicopters

Aircraft accident report

United States. National Transportation Safety Board.

Night Shift

Stephen King

Coast Guard

United States. General Accounting Office

Forever

Maggie Stiefvater

Operation of aircraft

International Civil Aviation Organization. Council

The International Directory of Civil Aircraft

Gerard Frawley

Jane's World Aircraft Recognition Handbook

Derek Wood

Hover craft

Angela Croome

Helicopter Flight Dynamics

Gareth D. Padfield